67654-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 67654-81-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,6,5 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 67654-81:
(7*6)+(6*7)+(5*6)+(4*5)+(3*4)+(2*8)+(1*1)=163
163 % 10 = 3
So 67654-81-3 is a valid CAS Registry Number.